| clangorous(adjective, loud, piercing, strident, high-pitched) |
| clattery(loud, piercing, strident) |
| clinking(adjective, harsh, discordant, inharmonious, jangly) |
| clumsy |
| colliding(adjective, conflicting) |
| contradictory(adjective, harsh, different, contrary, conflicting) |
| contrarient(adjective, harsh, different, contrary, conflicting) |
| contrary(adjective, harsh, different, conflicting, discordant) |
| craggy(adjective, hard, severe, sharp, flat) |
| crashing(strong, piercing, strident, noisy, blaring) |
| creaking(adjective, hard, severe, sharp, flat) |
| croaky |
| deafening(adjective, strong, loud, piercing, strident) |
| deep(strong, piercing, strident, noisy, blaring) |
| different(adjective, harsh, contrary, conflicting, discordant) |
| disagreeing(adjective, hard, severe, sharp, rough) |
| disconsonant |
| discord(adjective, discordant) |
| discrepant(adjective, harsh, different, contrary, conflicting) |
| disfigured |